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Different views available: Pressure Chamber Item Number: AP3955009 Manufacturer's Number: 499500 Made by Bosch Original Bosch Part BOSCH brands include Bosch, Thermador, Gaggenau, and others. Our Price: $27.82 Reg. retail: $33.38 You Save: $5.56 In Stock Order now and it will ship Today Quantity Questions & Answers For BOSCH Pressure Chamber (Part Number: AP3955009) Latest Questions Expand All 1 Answer Water fills the bottom tray and the pump would not shut off once the cycle is complete. I moved the dishwasher out to observe where the water is coming from.The Pressure Chamber has a hole in the upper section. When the relay opens the water supply, the pressure chamber starts leaking out of that hole towards the end of just about each of the three fill cycles. After about 4 to 6 washes, the there is enough water in the bottom to raise the float and cause the drain motor to run.The only way to stop it, is to empty the water.This dishwasher was designed to work this way, I guess.Anyway, I reduced the supply pressure to see if that would make a difference, but it did not. What is causing this problem? Should I replace the pressure chamber and/or switch level assy, or something else? Thanks for your advice! Asked by Peter for Model SHY66C Peter, you need to replace the pressure chamber, just like you thought. " Normal fill:Water rises to proper level, pushing air in pressure chamber which operates diaphragm. Overfill:Water rises too high & operates float switch, causing drain pump to remove water from sump." Thanks and Good Luck Answered by AppliancePartsPros.com Did you find this answer useful?       Yes    No 1 Answer the dishwasher does not pump out the water. I can here the motor but water just sits in the bottom. do you know what that is. I checked the lin for clogs, not clogs Asked by Terry for Model shu5306uc/14 Terry, You'checked the drain hose for clogs, Did you also check, Dishwasher filter(s) arms and sump for clogs or debris. When you have the filters out, you also want to check the sump, and sump outlet, and make sure the drain impeller vanes are not clogged or worn down. If alls OK, you'd want to disconnect the drain hose from the drain system connection under the kitchen sink, and drain the dishwasher into a large bucket, this will flush the drain line, and varify if the drain pump is operating properly. Thanks and Good Luck Answered by AppliancePartsPros.com Did you find this answer useful?       Yes    No 1 Answer Re part ap3955009. In one side of the housing is a red float. What is the black part on the other side? or is nothing there? If something is supposed to be there can I get it from you without buying the whole assembly? Where does the red "Stick" and the foam disk go? Thank you Asked by Harold for Model shu3032uc/12 Hi Harold. The internal black part is no longer available separately. The manufactures have gone to supplying sub assy. as many parts that work together directly. It is better for both replacement and any updates needed are included. Pressure chamber part # AP3955009. Thank You. Answered by AppliancePartsPros.com Did you find this answer useful?       Yes    No 1 Answer Does the Pressure Chamber include the float switch? Asked by Thesav for Model SHU4306 Hello TheSav. Yes, the pressure chamber AP3955009 includes the float switch. Hope this helps. Answered by AppliancePartsPros.com Did you find this answer useful?       Yes    No 1 Answer My dishwasher doesn't clean the dishes. The water doesn't have enough pressure to come out of the jets but the motor seem to be running fine. Asked by Zuke for Model SHU9915UC/ Hi Zuke. There is a micro-filter basket under the filter screen. This is attainable either with the spray arm off or on. Have you periodically taken this apart and cleaned under your sink? You can take all of the spray arms off and use a pick tool along with your sink water and flush out the food debris out. There is a cleaning product called dishwasher magic part # is AP4308827. Follow instructions on the bottle. There is a pressure chamber that transfers pressure to the water manifold is part # AP3955009. Thank you. Answered by AppliancePartsPros.com Did you find this answer useful?       Yes    No Back to top Cross Reference and Model Information Part Number 499500 (AP3955009) replaces 263834. Made by BOSCH. BOSCH brands include Bosch, Thermador, Gaggenau, and others. Part Number BOSCH 499500 (AP3955009) - PRESSURE CHAMBER is used with the following appliance models:   Popular Searches